✦ LIBER ✦

Structural change between NH4VO3 and V2O5 studied by using single crystals

✍ Scribed by M. Inagaki; T. Watanabe; Y. Yashiro; A. Shimizu

Book ID: 104296734
Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 493 KB
Volume: 101-103
Category: Article
ISSN: 0167-2738
DOI: 10.1016/s0167-2738(97)00245-2

No coin nor oath required. For personal study only.

✦ Synopsis

The structural changes between NH,VO, and V,O, are discussed from the results of decomposition and subsequent curing experiments starting with single crystals of NH,VO, with well developed bc and UC planes. The structural change from NH,VO, to V,O, was divided into five steps, including the first step up to 150°C to keep the original NH,VO, structure and the final 5th step to be V,O,. The preferred orientation of V,O, crystallites in particles was found to be strongly influenced by the heating rate. The crystal heated up to the 2nd step (150-180°C) could recover exactly the same single crystal by curing in saturated vapour of NH,-H,O at 25°C. The curing of crystals heated above the 4th step (above 210°C) resulted in a polycrystalline powder of NH,VO,. Structural changes during decomposition and curing between NH,VO, and V,O, are discussed.

📜 SIMILAR VOLUMES

A Hydrothermal Investigation of the 1 /

A Hydrothermal Investigation of the 1 / 2 V 2 O 5 −H 2 C 2 O 4 /H 3 PO 4 /NH 4 OH System: Synthesis and Structures of (NH 4 )VOPO 4 ·1.5H 2 O, (NH 4 ) 0.5 VOPO 4 ·1.5H 2 O, (NH 4 ) 2 [VO(H 2 O) 3 ] 2 [VO(H 2 O)][VO(PO 4 ) 2 ] 2 ·3H 2 O, and (NH 4 ) 2 [VO(HPO 4 )] 2 (C 2 O 4 )·5H 2 O

✍ Do, Junghwan; Bontchev, Ranko P.; Jacobson, Allan J. 📂 Article 📅 2000 🏛 American Chemical Society 🌐 English ⚖ 312 KB

The Hydrothermal NH4/V/P/H2O and K/V/P/N

The Hydrothermal NH4/V/P/H2O and K/V/P/N(C2H5)3/H2O Systems at 473 K and the Crystal Structures of NH4VOPO4and (NH4)3V2O3(VO)(PO4)2(HPO4)

✍ Michael Schindler; Werner Joswig; Werner H. Baur 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 333 KB

4؉ , and As 5؉ , but none of them crystallize in space group Pn2n. In the K/V/P/N(C 2 H 5 ) 3 / H 2 O system, three different K phases were found: K 0.5 VOPO 4 • 1.5H 2 O, KVOPO 4 , and K-FVP-1 (Frankfurt vanadium phosphate, one, or for short, FVP-1). The microporous K-FVP-1 compound was synthesize

ChemInform Abstract: A Hydrothermal Inve

ChemInform Abstract: A Hydrothermal Investigation of the 1/2V2O5—H2C2O4 /H3PO4/NH4OH System: Synthesis and Structures of (NH4)VOPO4×1.5H2O, (NH4)0.5VOPO4×1.5H2O, (NH4)2[VO(H2O)3]2 [VO(H2O)] [VO(PO4)2]2×3H2O, and (NH4)2 [VO(HPO4)] 2(C2O4)×5H2O.

✍ Junghwan Do; Ranko P. Bontchev; Allan J. Jacobson 📂 Article 📅 2000 🏛 John Wiley and Sons ⚖ 40 KB 👁 1 views

The Ag2O—V2O5—HF(aq) System and Crystal

The Ag2O—V2O5—HF(aq) System and Crystal Structure of α-Ag3VO4.

✍ Thomas A. Albrecht; Charlotte L. Stern; Kenneth R. Poeppelmeier 📂 Article 📅 2007 🏛 John Wiley and Sons ⚖ 13 KB 👁 1 views

The Ag 2 O−V 2 O 5 −HF (aq) System and C

The Ag 2 O−V 2 O 5 −HF (aq) System and Crystal Structure of α-Ag 3 VO 4

✍ Albrecht, Thomas A.; Stern, Charlotte L.; Poeppelmeier, Kenneth R. 📂 Article 📅 2007 🏛 American Chemical Society 🌐 English ⚖ 234 KB

Hydrothermal synthesis and crystal and m

Hydrothermal synthesis and crystal and molecular structure of a three-dimensional vanado-arsonate (NH4)3[(VO)(V2O3)(AsO4)2(HAsO4)], exhibiting both {VOV}∞ chains and isolated {V2O3} units

✍ Robert C. Haushalter; Linda Mayer; Sandeep S. Dhingra; Mark E. Thompson; Zhanwen 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 436 KB